Observation of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>X-Ray Band Emitted by the Transient C-C System Formed at keV Energies

MacDonald, J.; Brown, M. D.; Chiao, T.

doi:10.1103/physrevlett.30.471

Cited by 59 publications

(9 citation statements)

References 7 publications

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“…Two questions frequently encountered, are (1) are molecular orbital (MO) x rays being observed, and (2) what is the mechanism for the production of MO xrays? In this paper we consider K MO x rays, arising from transitions to vacancies in the l sa MO.…”

Section: Introductionmentioning

confidence: 99%

A scaling law for molecular orbital X Rays

Anholt¹

1978

Z Physik A

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Absolute molecular-orbital thick-target x-ray yields have been measured for a wide variety of targets using 1.4-MeV/amu 5~ 5SNi, and S6Kr and 2.4-MeV/amu 84Kr beams. A scaling law for calculating two-collision molecular-orbital x-ray yields is derived which fits the shape of the measured yields very well in all collision systems examined, and the intensity within a factor of two for near symmetric ion-atom encounters.

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Section: Introductionmentioning

confidence: 99%

A scaling law for molecular orbital X Rays

Anholt¹

1978

Z Physik A

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“…From all competing effects mentioned in Chapter 1, we suppose the quasimolecular (MO) radiation to be admixed dominantly. For the asymmetric diatomic systems considered here this radiation should arise in the target materials by adiabatic collisions between recoil atoms and atoms at rest [15]. Using the formulae given by Heinig et al [16] we constructed the correlation diagrams of the (neutral) collision systems Si + Si and Ti+Ti by scaling the H~ diagrams with state dependent screened nuclear charges.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Emission of X-ray continua by bombardment of thick Al, Si and Ti targets with protons and14N ions

et al. 1978

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Using thick targets the continuous X-ray spectra arising in the collision systems Al+p (0.5-7 MeV), Si + p (0.6-6 MeV), Si + 14N (6 MeV, 14 MeV), Ti + p (1 MeV) and Ti + 14N (14 MeV) were measured by means of a Si(Li) detector. Total yields were derived and compared with numerical results of calculations for secondary electron and nuclear bremsstrahlung. For Si and Ti the continuous spectra from one and the same target bombarded with protons and 14N ions of equal velocity were investigated. Drastic deviations from the Z 2 scaling have been found. They could be attributed to contributions of MO radiation originating by recoil of target atoms. The influence of characteristic line profiles on the measured spectra is also discussed.

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“…Most of these calculations 1 are based on the Born approximation for direct Coulomb ionization established by Bethe. 2 In this paper we apply the more rigorous Glauber approximation 3 to the ionization of atomic hydrogen by electron impact to compute the total cross section as a function of the energy of the incident electron.…”

Section: Calculation Of Total Cross Sections For the Ionization Of Atmentioning

confidence: 99%

“…3,5 The interpretation of experiments involving MO K x-ray emission from high-energy collisions of heavier ions with heavy atoms are presently more speculative. One of the principal difficulties in interpreting these measurements is that the available theories of inner-shell vacancy production in high-energy, heavy-ion-atom collisions are not sufficiently developed to permit prediction of the details of the spectral distribution and of the features of the production cross section such that these can be exploited as a guide for identifying MO K x-ray emission.…”

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confidence: 99%